In a small bowl, add cream cheese, peanut butter, and honey. Stir to combine.Spread cream cheese mixture on one slice of bread. Top with banana slices and mini marshmallows. Spread chocolate hazelnut spread on the other slice of bread and place it on top of the slice with bananas.Heat 1 tablespoon of butter in a sauté pan over medium-low heat. Place the prepared sandwich in the pan. Cook for 2-3 minutes on each side, or until golden brown.Slice the sandwich in half and serve warm.